Chuck



G. A. ENGLUND CHUCK May 31.1927. 7 1,630,259

Filed Au 27, 1925 I Patented May lf1927s GUSTAE A. nneiiuivn-oi wnsrnenrrfoan,coimncmicnr, nssrenonno JACOBS j MANUFAcmURmGcoMPANY, or nanrronn, onnect cut, A."c onromir onor I CON ECTICUT...

f Application filed August 27,-.1925. se i 11nbn5 23'19.

This invention relates to the class t chucks which are :more particularly desi 'ned for use in connection with. grinders, miiling 'maclnnes and the like-'whe're accurate. work is required. l

The object of the invention is to provide a combination of elements which results in a quick acting chuck of wide range that willhold long rods or short pieces of work of various diametersand that has no overhang,

' that is, has the jaws firmly supported about their holding ends. Such a chuck is capable of use in place of the more expensive collet chucks which require a number ofcol- .lets for holding different diameters of grinding or similar machine with which the I chuck is to beused. Attached to the base plate is a yoke-shaped frame '2, the limbs of which have aligned perforations. In one perforation there is a bushing 3 w1th a cylindrical bearing torsupporting the driv ing spindle 4, andfin the other perforation is a bushing 5wit-h a tapering bearing: for

supporting the conical chuck nose 6. l The bushin 5 may have a ackin rim 7 to p in 7 b Y b prevent the entrance of dust between the chuck nose and its bearing.

The spindle is tubular and it maybe driven by any suitable means. The spindle has an exteriorly' threaded section 8 in] frontot thehushing 3 and a tapering section 9 in front of the threaded section. 10 and 11 are turned onthe threaded section for adjusting and retaining the spindle. in such position thatthe nose of the chuck will. T closely fit but lireely'turn' in the. bushing 5.

The chuck body 12 has a tapering opening that fit-s upon the tapering end of the spindle. "When" it is desiredito remove the spindle'fromthe chuck body the nuts'may be turned'out so as to force'the spindl'e' from the chuck body. In. thebody are tending and forwardly converglng bores 13,

backward and, outward according to the may be 1 dimensions. 1

Nuts

three longitudinally ex the tapering bushings and movable-baekgand forth in;these boresv are the holding aWsA'l Js; The backs otfthe engaging with which is the internal thread in the ring 15 that is located in an'lannular groovejaround the body so as itm b "p rotated but not moved axially of the chuck; Rotatably .fitted: upon; the; body is a sleeve jaws are provided withsegmentalthreads 16 that is tightly connected with the ring 1 i Therearedgeot the sleeve has gear teeth that are adapted to be engaged by the pinion teeth of a key 17 which is applied to the body, whenit-isdesired-to open or, close the Jaws, withits. stem inserted'inmf one of the radial sockets 18 intheflbody"- near the rear end. Upon turning'the sl'eeve, either by the key if such is used,- or byhand it there is no key, the ring is rotated. and

the jaws moved forward'and inward or direction the sleeve-is turned, in'. the well known way. 1

With the present structure the teeth are 7 at the. rear edge of the sleeve and the open ating key is applied at the back end of the irbodylr This enables the tapering nose to be" used as one ofthejournals for the chuck and allows the'be'aring 'tobe-brought close in to the end ofthe chuck body where it terms a firm support about the work holdmg 1aws. Achuck designed and supported as herein described is capable of accurately holding short pieces .or long rods. of work of widely varyingdiameter' so that" they The invention claimed is may begroun'd or turned to exact. desired I j i I 0 1. A chucking means comprising aframe W having axially aligned boresy abu'shing with y bushing with a tapering opening locatediin the other bore, a spindle rotatably fitted a cylindrical opening located in one bore,

in the formerbnshi'no, a chuck body jrem'ovably connected with the spindle, said body having a tapering nose rotatably fitted the tapering bushing, jawslmovable in'iithe 'body, means located 'on' chuck body be tween said bushin'gs for opening and closing V said jaws, and means on the spindle adjacent to the spindle-supporting bushing'fan dadapted-to engage said bushing for adjust ing the 1 position. of saidtapering nose in;

2. A chucking means comprising a frame having axially aligned bores, a bushing with a cylindrical opening located 1n-one bore,

a bushing with atapering opening located j in theother bore, a spindle rotatablylfitted in the'former bushing, a chuck body remov ably connected With the spindle, said body having a tapering nose rotatablv fitted in the e latter bushing, IjaWs movable in the body, 10

means located between said bushings "for the'other of said nuts being adapted to engage the body for separating the body and the spindle.

13. A chucking means comprising a frame the body for h aying' axially aligned boresfa bushing With a cylindrical opening located in onebore,

abushing ith a tapering opening located in -the other bore, a packing ring around the interior of said tapering bushing, a

spindlefrotatably fitted-inthe fo-rmer bush- 1 ing, a chuck-body rerno vably connected with the spindle, said body-having-atapering nose rotatably fitted in the latter bushing, jaws movable in the body, means located between said-bushings for, opening and closing said aws, and means located on the SPlIlCllQ ad.

jacent to the spindle-supportingbushing and adapted to engage said bushing for adjustmg the positlonfoit saidtaperlng nose in the tapering bushing and means to engage spindle.

' GnsTAF A, GLUNDL separating the body and the 

